Eto'o arrived at Chelsea last summer from Anzhi Makhachkala, reuniting with his former Inter Milan boss Jose Mourinho at Stamford Bridge, and the Cameroonian star has been on the goal trail of late, taking his tally for the season up to 11 goals in all competitions.
Now 33-years-old, Eto'o has a decorated career, which included winning the treble with Barcelona in 2008-2009, as the Catalan giants were evidently the cream of the crop in European football, establishing themselves as the leading side on the continent.
But under manager Guardiola, Eto'o was considered expendable, and he was unsurprisingly sent packing. Used as a makeweight in the deal that saw Zlatan Ibrahimovic head to the Camp Nou, Eto'o headed to Inter and scored 53 goals in 101 games, and with Swede Zlatan struggling in Spain, Inter clearly won the deal.
Eto'o's disgruntlement at how Guardiola treated him has been kept relatively quiet, but came flooding out last night as the Chelsea star opened the lid on his relationship with the now Bayern Munich boss during an interview with beIN SPORTS.
"You know the press and the TV. There are those who are favourites and those who are not. I was one of the latter," he said. "That was my role, but I had a very important role in the dressing room where I could say anything to anyone, looking them straight in the eye."
"I first of all reminded Guardiola that he'd never been a great player. He was a good player, that's true. I told him. As a coach, he had proven nothing. He came in and didn't even know the story of the dressing room. I talked to him and had a very good offer to go and play for six months in Uzbekistan where they would have given me 26 million dollars. In his office, he said to me: 'That could do you good, go for it.'
"I told him that Eto'o was the one who made him win and that he would come and ask for forgiveness. And I stayed. He never had the courage to say things to my face," he added.
Guardiola has led Bayern to the top of the Bundesliga this season and saw his side dispatch of Arsenal in the Champions League, and will now face Manchester United in the next round. He's a familiar face in world football and one of the most lauded coaches around, but it's clear that Eto'o wasn't impressed by him.